media compression

 



At the beginning of this assignment I have heard about compression related to media however I never gave it a second thought to what it actually is. Media compression is basically reducing file size and saving disk space. There are two types of compression,

  1. Lossy- This is when information is removed or lost.
  2. Lossless- This means that it is important that no information is lost or changed.
I watched many videos from YouTube which I will link below on topics of compression like video/audio compression, changing size etc. Video compression works mainly by minimizing redundancy in the video data. The use of words/data that could be taken out without losing the meaning or function of the video. This could be simply done by taking snippets of repetitive stories/information within the video out. There are two ways to compress a video; Spatial compression/Intraframe= JPEG. form and Temporal compression/interframe= .MPEG

 BITRATE is how much information your video sends out per second from your device to an online platform. The lower the bitrate=lower the quality and you guessed it the higher the bitrate= the higher the quality. I personally have never came across bitrate before so this was new to me completely. The more bits the better the video will be. 

We came across codec. Codec is a piece of software needed for audio and video compression. It is used to compress then decompress the content. Think of codec as a key or a set of instructions for compressing/decompressing files. One rule that has to followed with codec is the creator and the end user must have the same code. We then learned many things about vidoe/audio codecs. The most popular one in video is H.264/AVC, it has a better bitrate and no support issues. The most popular codec when it comes to audio is AAC( Advanced Audio Coding) this is known for having the best sound, high bitrate however it is limited on audio channels. 

The number of bits we have determines how much date we can store. I learned down the line of bits to terabytes:
1. Bites and 8 bites together = 1Byte
      2. 1000 Byte = 1 Kilobyte
          3. 1000Kilobytes = 1 Megabyte
             4. 1000Megabyte = 1 Gigabyte
                5. 1000 Gigabytes = 1 Terabyte and so on.

I think to date for me this was the most difficult information to wrap my head around. I felt it was a huge bunch of figures which I am not the best with however this is the knowledge I gained from these videos below. 

References

Teqhuickie (2014) "Video compression as fast as possible"   

Typical gamer moments (2019) Difference in Framerates | 60FPS vs 30FPS vs 15FPS vs 8FPS (Full HD) Difference in Framerates | 60FPS vs 30FPS vs15FPS vs 8FPS (Full HD) - YouTube

Double A (2017) What you Lose When You Compress Music to MP3, M4A, WMA, etc.


Qencode (2017) Video Formats, codecs and containers (Explained)

Hartman, D (2020) Computer Skills Course, Bits, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes (UPDATED VERSION) Computer Skills Course: Bits, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes (UPDATED VERSION) - YouTube

Comments

Post a Comment

Popular posts from this blog

Reading Techniques

Image
I have read two articles on reading techniques, one helped us to learn and understand critical reading techniques and the other was on active reading, both feeding us mountains of information with how we can get work/study done in a more sufficient way. When I read about critical reading techniques, I found it to be very insightful for future readings/study. You should always know what you are reading was a point that really stood out to me because in truth not everyone does. From my own experience of secondary school majority of people would be asking their friends what topic/page we were on, because they had lost track due to their lack of understanding. School subjects are so broad that you aren't going to be the best in every class but you also shouldn't be afraid to raise your hand when you do not understand something. But with time confidence grows.  In the article it states that it is key to make sure you're in a comfortable space. Library's are amazing for this ...
Read more

Digital Media

Image
Today I will be writing a blog about three videos I watched based on digital literacy, what it is?why it matters? And the elements of digital literacies.    Digital media to me consisted of things like my phone/laptop/iPad and how I have the access to a wide range of information. The video made me think about how much has evolved within digital media for things like how quickly we can access information we are not even looking for, for example advertisements before YouTube videos. Another scary thing can be how others get caught up in what people are portraying online that we almost forget to question, what if this article, picture, or post isn't all that true? I thought working in the digital media sector these days you would have to be extremely skilled in software developments/updates, you would need serious communication skills(however that's a given in majority of jobs) and being able to work PowerPoint/photoshop/HTML etc.  In these videos and some res...
Read more

Media Representations

  This week I watched videos about media ethics and the potential implication for society but mainly focusing on representation in media. Representation is how media like tv, films and books can portray certain types of people or communities.   There are many reasons to why representation matters. It's to give people and culture a voice, they can share their experiences, it represents cultures and shares stories. It is vital for every person, whether in front of the camera or behind the scenes to have a voice. We are constantly seeing content that's very white, and straight. I believe with time things are changing, with my experience of growing up has been quit positive when on the topic of representation. We have had such a participation through social media on "black lives matter" and "pride"(pride even has its own month). This is all fantastic especially with the next generation people's voices are becoming louder and hopefully someday we will live in...
Read more